Application Of Safety System Engineering In Blasting Demolition

With the development of economy the structures and building of the world buildingmore and more quickly. So some of the old buildings need to be removed to update. Thedemolition blasting widely used in the dismantling of the buildings and structures with safeand fast and economical. But the control blasting safety is relative. If it is improperly ofrisk control of demolition blasting can cause more harm than other demolition method.The risk of blasting demolition is determined by its particularity. For blastingdemolition of buildings mostly in the densely populated area. So it is very important tocontrol collapse scope and direction and vibration and other aspects. And with the progressof science and technology the modern building height is also more and more high andshape and structure becomes more and more complex and diverse. All of these factors spurthe safety of demolition blasting is development. Safety control and management of citybuilding blasting is especially important.Achieve security goals is the first consideration in the demolition blasting construction. While the use of the method of safety system engineering analysis and evaluation can achieve the ideal effect of demolition blasting.This paper using safety system engineering knowledge to decompose the blasting system. So system is decomposed into small parts in order to observation and analysis. The search and classification system dangerous source so that using in safetySystem engineering methods to analysising. We have a preliminary understanding of the system risk by using preliminary hazard analysis. Using event tree and fault tree analysis method to qualitative analysis for specific components or accidents. Analysis the demolition blasting system detonating network and electricnetwork by using event tree. Analysis of some accidents frequently occur in demolition blasting system by using fault tree analysis. Such as blasting flyrock wounding and impact vibration and the process and causes and preventive measures of blasting but not fall accident. Analysis of the minimal cut sets and the minimal path set method can lead to accidents and incidents minimum does not happen by accident tree. Judgmentthe weight of Base events by use the structure importance so that priority and targeted for accident control. System safety evaluation is to evaluate the accident risk.Safety evaluation based on qualitative and quantitative analysis of the risk factors or the system, Safety evaluation is to compare a safety standards of be given, So asto obtain the security situation of system or dangerous source.For example, dangerous source of demolition blasting system make list evaluation according by the fourrisk method in the preliminary hazard analysis. The probability of top event is quantitative risk evaluation in the event tree analysis. Safety decision part of this paper belongs to the fuzzy decision, fuzzy security attributes will be demolished blasting system was quantified by various criteria. Then get the system of risk through the security decision model. First we can building the safety system decision structure modelof demolition blasting, lists the factors of affecting the safety. For these safety factors, to select several words which we need to evaluation score, according to the decisionmodel of demolition blasting systems for integrated security decision. In the end wecan get the degree of risk about this system.Research model in this paper can provide a template for future similar demolition blasting safety control. From the analysis of demolition blasting systems, hazardidentification, classification methods, major hazard identification, prevention methods, and the risk calculation method can be used as a reference project engineering and technical personnel. This article compares the research process is dependent on the previous similar systems, data collection similar incidents, analyze, summarize and practical engineering experience, So to improve the reliability of the content of this thesis must conscientiously do a good job in the above two points.